Co-time co-frequency full duplexing system and mobile terminal

ABSTRACT

Provided are a co-time co-frequency full duplexing system and a mobile terminal. The co-time co-frequency full duplexing system includes a baseband processing circuit, a transmitting terminal signal processing circuit, a receiving terminal signal transmission circuit, a signal transceiver circuit. A first end of the baseband processing circuit is electrically connected to a first end of the transmitting terminal signal processing circuit, a second end of the transmitting terminal signal processing circuit is electrically connected to a first end of the signal transceiver circuit, a second end of the baseband processing circuit is electrically connected to a first end of the receiving terminal signal processing circuit, a second end of the receiving terminal signal processing circuit is electrically connected to a second end of the signal transceiver circuit. The signal transceiver circuit transmits an uplink signal and receive a downlink signal simultaneously, and isolate the uplink signal from the downlink signal. In the above technical solution, the signal transceiver circuit may transmit the uplink signal and receive the downlink, and isolate the uplink signal from the downlink signal. It is able to achieve the self-interference suppression, and simplify a link.

TECHNICAL FIELD

The present invention relates to the field of communication technology,in particular to a co-time co-frequency full duplexing system and amobile terminal.

BACKGROUND

A 5^(th)-Generation (5G) mobile communication system needs to support ahigher uplink/downlink transmission rate, so it is necessary to providea larger bandwidth and a higher spectrum utilization rate. A current4^(th)-Generation (4G) Long Term Evolution (LTE) communication systemmerely supports a Time Division Duplexing (TDD) or Frequency DivisionDuplexing (FDD) mode, resulting in inflexible configuration and a lowspectrum utilization rate. Hence, as one of the critical 5G techniques,a co-time co-frequency full duplexing technique has been presented, soas to perform uplink transmission and downlink transmission at a samefrequency simultaneously. For a co-time co-frequency full duplexingsystem in prior art, in order to achieve self-interference suppression(i.e., an interference caused by a transmission signal on a receptionsignal), a transmission antenna needs to be separated from a receptionantenna. i.e., an isolation between the antennae is achieved throughspatial separation. In this regard, during the link implementation, twoco-frequency filters and two sets of antenna switches need be provided,resulting in a complex link and high cost.

SUMMARY

An object of the present invention is to provide a co-time co-frequencyfull duplexing system and a mobile terminal, so as to solve a problemthat a radio frequency (RF) link is complex and the cost is high in theco-time co-frequency full duplexing system of the prior art.

In one aspect, the present invention provides in some embodiments aco-time co-frequency full duplexing system, including a basebandprocessing circuit, a transmitting terminal signal processing circuit, areceiving terminal signal transmission circuit and a signal transceivercircuit. A first end of the baseband processing circuit is electricallyconnected to a first end of the transmitting terminal signal processingcircuit, a second end of the transmitting terminal signal processingcircuit is electrically connected to a first end of the signaltransceiver circuit, a second end of the baseband processing circuit iselectrically connected to a first end of the receiving terminal signalprocessing circuit, and a second end of the receiving terminal signalprocessing circuit is electrically connected to a second end of thesignal transceiver circuit. The signal transceiver circuit is used fortransmitting an uplink signal and receive a downlink signalsimultaneously, and isolating the uplink signal from the downlinksignal.

In another aspect, the present invention provides in some embodiments amobile terminal including the above-mentioned co-time co-frequency fullduplexing system.

According to the embodiments of the present invention, the signaltransceiver circuit may transmit the uplink signal and receive thedownlink, and isolate the uplink signal from the downlink signal. As aresult, it is able to achieve the self-interference suppression,simplify a link and reduce the cost.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to illustrate the technical solutions of the present inventionin a clearer manner, the drawings desired for the present invention willbe described hereinafter briefly. Obviously, the following drawingsmerely relate to some embodiments of the present invention, and based onthese drawings, a person skilled in the art may obtain other drawingswithout any creative effort.

FIG. 1 is a schematic view showing a co-time co-frequency full duplexingsystem according to an embodiment of the present invention;

FIG. 2 is another schematic view showing the co-time co-frequency fullduplexing system according to an embodiment of the present invention;

FIG. 3 is a schematic view showing a co-frequency isolator according toan embodiment of the present invention; and

FIG. 4 is a block diagram of a mobile terminal according to anembodiment of the present invention.

DETAILED DESCRIPTION

Hereinafter, the exemplary embodiments of the present invention aredescribed in detail with reference to the accompanying drawings. Itshould be appreciated that, although the exemplary embodiments of thepresent invention are illustrated in the accompanying drawings, thedisclosure may, however, be embodied in many different forms and shouldnot be construed as being limited to the embodiments set forth herein.Rather, these embodiments are provided so that the present inventionwill be thorough, and will fully convey the scope of the presentinvention to a person skilled in the art.

In one aspect, the present invention provides in some embodiments aco-time co-frequency full duplexing system 100 which, as shown in FIG.1, includes a baseband processing circuit 101, a transmitting terminalsignal processing circuit 102, a receiving terminal signal processingcircuit 103 and a signal transceiver circuit 104.

The transmitting terminal signal processing circuit 102 and thereceiving terminal signal processing circuit 103 may be bothelectrically connected to the baseband processing circuit 101, and thesignal transceiver circuit 104 may be electrically connected to thetransmitting terminal signal processing circuit 102 and the receivingterminal signal processing circuit 103. To be specific, a first end ofthe baseband processing circuit 101 may be electrically connected to afirst end of the transmitting terminal signal processing circuit 102, asecond end of the transmitting terminal signal processing circuit 102may be electrically connected to a first end of the signal transceivercircuit 104, a second end of the baseband processing circuit 101 may beelectrically connected to a first end of the receiving terminal signalprocessing circuit 103, and a second end of the receiving terminalsignal processing circuit 103 may be electrically connected to a secondend of the signal transceiver circuit 104.

The baseband processing circuit 101 is used for encoding ato-be-transmitted uplink signal, or decoding a received downlink signal.

The transmitting terminal signal processing circuit 102 is used for,e.g., converting and modulating the uplink signal outputted from thebaseband processing circuit 101, and transmitting the processed uplinksignal to the signal transceiver circuit 104.

The signal transceiver circuit 104 is used for transmitting the uplinksignal outputted from the transmitting terminal signal processingcircuit 102, and simultaneously receiving the uplink signal transmittedfrom a network device such as a base station or a communicationsatellite and, and transmitting the received downlink signal to thereceiving terminal signal processing circuit 103. In a possibleembodiment of the present invention, the signal transceiver circuit 104is capable of isolating the uplink signal from the downlink signal, soas to reduce an interference caused by the uplink signal on the downlinksignal.

The receiving terminal signal processing circuit 103 is used for, e.g.,converting and demodulating the downlink signal outputted from thesignal transceiver circuit 104, and transmitting the processed downlinksignal to the baseband processing circuit 101, so that the basebandprocessing circuit 101 may, e.g., decode the downlink signal.

In the embodiments of the present invention, the signal transceivercircuit 104 may transmit the uplink signal and receive the downlinksignal simultaneously, and isolate the uplink signal from the downlinksignal. As a result, it is able to receive and transmit the signals andisolate the signals from each other through one signal transceivercircuit, so as to simplify a link of the co-time co-frequency fullduplexing system 100, and reduce the cost.

As shown in FIG. 1, in the embodiments of the present invention, thetransmitting terminal signal processing circuit 102 may be furtherelectrically connected to the receiving terminal signal processingcircuit 103. To be specific, a third end of the transmitting terminalsignal processing circuit 102 may be electrically connected to a thirdend of the receiving terminal signal processing circuit 103. When thetransmitting terminal signal processing circuit 102 processes the uplinksignal received from the baseband processing circuit 101, thetransmitting terminal signal processing circuit 102 may further extractenvelope information (e.g., an amplitude parameter and a phaseparameter) about the uplink signal to form a self-interferenceelimination reference signal, and transmit the self-interferenceelimination reference signal to the receiving terminal signal processingcircuit 103. In this way, when the uplink signal and the downlink signalare mixed together and enter the receiving terminal signal processingcircuit 103, the uplink signal may be suppressed through theself-interference elimination reference signal, so it is able to reducethe interference caused by the uplink signal on the downlink signal.

To be specific, the transmitting terminal signal processing circuit mayinclude a transmitting terminal digital signal processing circuit 1021and a transmitting terminal analog signal processing circuit 1022.

As shown in FIG. 2, the baseband processing circuit 101 may beelectrically connected to the transmitting terminal digital signalprocessing circuit 1021, the transmitting terminal digital signalprocessing circuit 1021 may be electrically connected to thetransmitting terminal analog signal processing circuit 1022, and thetransmitting terminal analog signal processing circuit 1022 may beelectrically connected to the signal transceiver circuit 104 in turn. Tobe specific, a first end of the transmitting terminal digital signalprocessing circuit 1021 may be electrically connected to the first endof the baseband processing circuit 101, a second end of the transmittingterminal digital signal processing circuit 1021 may be electricallyconnected to a first end of the transmitting terminal analog signalprocessing circuit 1022, and a second end of the transmitting terminalanalog signal processing circuit 1022 may be electrically connected tothe first end of the signal transceiver circuit 104.

The transmitting terminal digital signal processing circuit 1021 is usedfor receiving the uplink signal transmitted from the baseband processingcircuit 101, subjecting the received uplink signal to the digitalizationprocess, and transmitting the resultant uplink signal to thetransmitting terminal analog signal processing circuit 1022. Thetransmitting terminal analog signal processing circuit 1022 is used forup-converting and modulating the uplink signal received from thetransmitting terminal digital signal processing circuit 1021, andtransmitting the resultant uplink signal to the signal transceivercircuit 104.

The baseband processing circuit is used for providing ato-be-transmitted useful uplink signal. The transmitting terminaldigital signal processing circuit 1021 is further used for receiving theuplink signal transmitted from the baseband processing circuit 101,subjecting the received uplink signal to the digitalization process, andtransmitting the resultant uplink signal to the transmitting terminalanalog signal processing circuit 1022. Then, the transmitting terminalanalog signal processing circuit 1022 is further used for converting theuplink signal from a digital signal to an analog signal, up-convertingand modulating the analog signal, and then transmitting the resultantuplink signal to the signal transceiver circuit 104. The signaltransceiver circuit 104 is further used for transmitting the uplinksignal to the network device such as the base station or thecommunication satellite.

To be specific, the receiving terminal signal processing circuit 103 mayinclude a receiving terminal digital signal processing circuit 1031 anda receiving terminal analog signal processing circuit 1032.

As shown in FIG. 2, the baseband processing circuit 101 may beelectrically connected to the receiving terminal digital signalprocessing circuit 1031, the receiving terminal digital signalprocessing circuit 1031 may be electrically connected to the receivingterminal analog signal processing circuit 1032, and the receivingterminal analog signal processing circuit 1032 may be electricallyconnected to the signal transceiver circuit 104 in turn. To be specific,a first end of the receiving terminal digital signal processing circuit1031 may be electrically connected to the first end of the basebandprocessing circuit 101, a second end of the receiving terminal digitalsignal processing circuit 1031 may be electrically connected to a firstend of the receiving terminal analog signal processing circuit 1032, anda second end of the receiving terminal analog signal processing circuit1032 may be electrically connected to the second end of the signaltransceiver circuit 104.

The receiving terminal analog signal processing circuit 1032 is furtherused for receiving the downlink signal transmitted from the signaltransceiver circuit 104, down-converting and demodulating the downlinksignal, and transmitting the resultant downlink signal to the receivingterminal digital signal processing circuit 1031. The receiving terminaldigital signal processing circuit 1031 is used for subjecting thedownlink signal received from the receiving terminal analog signalprocessing circuit 1032 to a digitalization process, and transmittingthe resultant downlink signal to the baseband processing circuit 101.

The signal transceiver circuit is further used for receiving a usefuldownlink signal transmitted from the network device such as the basestation and the communication satellite. The receiving terminal analogsignal processing circuit 1032 is further used for receiving thedownlink signal outputted from the signal transceiver circuit 104,down-converting and demodulating the downlink signal, and transmittingthe resultant downlink signal to the receiving terminal digital signalprocessing circuit 1031. The receiving terminal digital signalprocessing circuit 1031 is further used for subjecting the downlinksignal to the digitalization process, and transmitting the resultantdownlink signal to the baseband processing circuit 101.

As shown in FIG. 2, the transmitting terminal digital signal processingcircuit 1021 may be further electrically connected to the receivingterminal digital signal processing circuit 1031, and the transmittingterminal analog signal processing circuit 1022 may be furtherelectrically connected to the receiving terminal analog signalprocessing circuit 1032. To be specific, a third end of the transmittingterminal digital signal processing circuit 1021 may be electricallyconnected to a third end of the receiving terminal digital signalprocessing circuit 1031, and a third end of the transmitting terminalanalog signal processing circuit 1022 may be electrically connected to athird end of the receiving terminal analog signal processing circuit1032.

The transmitting terminal digital signal processing circuit 1021 isfurther used for, when subjecting the uplink signal to thedigitalization process, extracting a digital self-interferenceelimination reference signal of the uplink signal, and transmitting thedigital self-interference elimination reference signal to the receivingterminal digital signal processing circuit 1031. The transmittingterminal analog signal processing circuit 1022 is further used for, whenup-converting and modulating the uplink signal, extracting an analogself-interference elimination reference signal of the uplink signal, andtransmitting the analog self-interference elimination reference signalto the receiving terminal analog signal processing circuit 1032.

The digital self-interference elimination reference signal may be areference signal generated in accordance with the envelope information(e.g., the amplitude parameter and the phase parameter) about the uplinksignal extracted by the transmitting terminal digital signal processingcircuit 1021, and the analog self-interference elimination referencesignal may be a reference signal generated in accordance with theenvelope information (e.g., the amplitude parameter and the phaseparameter) about the uplink signal extracted by the transmittingterminal analog signal processing circuit 1022.

To be specific, when receiving the useful downlink signal transmittedfrom the network device such as the base station or the communicationsatellite, the signal transceiver circuit 104 may receive a part of theuplink signal leaked from a transmission path simultaneously. The leakeduplink signal and the useful downlink signal may be mixed together toform a self-interference. In order to suppress the interference causedby the uplink signal, the transmitting terminal digital signalprocessing circuit 1021 may, when processing the uplink signal, extractthe envelop information about the uplink signal as the digitalself-interference elimination reference signal, and the transmittingterminal analog signal processing circuit 1022 may, when processing theuplink signal, extract the envelop information about the uplink signalas the analog self-interference elimination reference signal. In thisregard, when the downlink signal mixed with the uplink signal passesthrough the receiving terminal analog signal processing circuit 1032, apart of the uplink reference signal may be eliminated under the effectof the analog self-interference elimination reference signal, and whenthe downlink signal mixed with the uplink signal passes through thereceiving terminal digital signal processing circuit 1031, the uplinkreference signal may be further eliminated under the effect of thedigital self-interference elimination reference signal, so as to achievethe self-interference suppression.

Further, the signal transceiver circuit 104 may include a co-frequencyisolator 1041, a transceiver filter 1042, an antenna switch 1043 and atransceiver antenna 1044.

As shown in FIG. 2, the transmitting terminal analog signal processingcircuit 1022 and the receiving terminal digital signal processingcircuit 1031 may be electrically connected to the co-frequency isolator1041, the co-frequency isolator 1041 may be electrically connected tothe transceiver filter 1042, the transceiver filter 1042 may beelectrically connected to the antenna switch 1043, and the antennaswitch 1043 may be electrically connected to the transceiver antenna1044 in turn. To be specific, a first end of the co-frequency isolator1041 may be electrically connected to the second end of the transmittingterminal analog signal processing circuit 1022, a second end of theco-frequency isolator 1041 may be electrically connected to the secondend of the receiving terminal digital signal processing circuit 1031, athird end of the co-frequency isolator 1041 may be electricallyconnected to the first end of the transceiver filter 1042, a second endof the transceiver filter 1042 may be electrically connected to thefirst end of the antenna switch 1043, and a second end of the antennaswitch 1043 may be electrically connected to the transceiver antenna1044.

Upon the co-frequency isolator 1041 receives the uplink signaltransmitted from the transmitting terminal analog signal processingcircuit 1022, the co-frequency isolator 1041 is further used fortransmitting the uplink signal to the transceiver filter 1042. Thetransceiver filter 1042 is further used for filtering the uplink signaltransmitted from the co-frequency isolator 1041. The antenna switch 1043is used for transmitting the uplink signal filtered by the transceiverfilter 1042 to the transceiver antenna 1044. The transceiver antenna1044 is used for transmitting the uplink signal transmitted from theantenna switch 1043.

Upon the transceiver antenna 1044 receives the downlink signal, thetransceiver antenna 1044 is further used for transmitting the receiveddownlink signal to the antenna switch 1043. The antenna switch 1043 isfurther used for transmitting the downlink signal transmitted from thetransceiver antenna 1044 to the transceiver filter 1042. The transceiverfilter 1042 is further used for filtering the downlink signaltransmitted from the antenna switch 1043, and transmitting the filtereddownlink signal to the co-frequency isolator 1041. The co-frequency 1041is further used for isolating the transmission and reception of theuplink signal from the transmission and reception of the downlinksignal.

In other words, the transmitting terminal analog signal processingcircuit 1022 may transmit the processed uplink signal to theco-frequency isolator 1041. Upon the receipt of the uplink signal, theco-frequency isolator 1041 may transmit the uplink signal to thetransceiver filter 1042 for filtration. The filtered uplink signal maybe transmitted through the antenna switch 1043 to the transceiverantenna 1044, and then the transceiver antenna 1044 may transmit theuplink signal. Simultaneously, the transceiver antenna 1044 may receivethe downlink signal and transmit, through the antenna switch 1043, thedownlink signal to the transceiver filter 1042 for filtration. Thefiltered downlink signal may be transmitted to the co-frequency isolator1041, and the co-frequency isolator 1041 may isolate the transmissionand reception of the uplink signal from the transmission and receptionof the downlink signal, so as to suppress the interference caused by theuplink signal on the downlink signal.

To be specific, as shown in FIG. 3, the co-frequency isolator 1041 mayinclude a transmission pin 10411, a reception pin 10412, an antenna pin10413 and a load-grounded pin 10414.

The transmission pin 10411 may be electrically connected to thetransmitting terminal analog signal processing circuit 1022 (to bespecific, the transmission pin 10411 may be electrically connected tothe second end of the transmitting terminal analog signal processingcircuit 1022), and the transmission pin 10411 may be connected to theantenna pin 10413 to form a transmission path for the uplink signal. Thereception pin 10412 may be electrically connected to the receivingterminal analog signal processing circuit 1032 (to be specific, thereception pin 10412 may be electrically connected to the second end ofthe receiving terminal analog signal processing circuit 1032), and thereception pin 10412 may be connected to the antenna pin 10413 to form areception path for the downlink signal. The antenna pin 10413 may beelectrically connected to the transceiver filter 1042. The load-groundedpin 10414 may be connected to a housing of the co-frequency isolator1041, or electrically connected to a ground end in an internal circuitof the co-frequency isolator 1041.

In the embodiments of the present invention, the co-frequency isolator1041 may be a novel four-port device. The transmission pin 10411 (i.e.,a TX pin in FIG. 3) may function as to input the uplink signal, thereception pin 10412 (i.e., an RX pin in FIG. 3) may function as tooutput the downlink signal, the antenna pin 10413 (i.e., an ANT pin inFIG. 3) may function as to output the uplink signal and input thedownlink signal, and the load-grounded pin 10414 (GND) may function asto provide a reference ground for the co-frequency isolator 1041.

Apart from the above four pins, the co-frequency isolator 1041 mayfurther include a transmission path and a reception path. Thetransmission path may be connected to the transmission pin 10411 and theantenna pin 10413, and the reception path may be connected to thereception pin 10412 and the antenna pin 10413. The transmission path andthe reception path may each be a one-way path. The transmission path isarranged in such a manner as to merely allow the signal to betransmitted from the transmission pin 10411 to the antenna pin 10413,rather than from the antenna pin 10413 to the transmission pin 10411,and the reception path is arranged in such a manner as to merely allowthe signal to be transmitted from the antenna pin 10413 to the receptionpin 10412, rather than from the reception pin 10412 to the antenna pin10413.

The transmission path and the reception path may each be implementedthrough a transmission line within the co-frequency isolator 1041, i.e.,each of the transmission path and the reception path may be formed by atransmission line. Due to a small load of the transmission line, it isable to reduce the loss of the load power and reduce the insertion loss.

Further, in the embodiments of the present invention, a line spatialdistance between the transmission pin 10411 and the reception pin 10412and a line spatial distance between the transmission path and thereception path may each be greater than or equal to three times of aline width, so as to provide a space isolation greater than 40 dB,thereby to enable the co-frequency isolator 1041 to isolate the uplinksignal from the downlink signal. The space isolation may be not smallerthan an amplitude suppression value of an amplitude limiter 10415.

As shown in FIG. 3, in the embodiments of the present invention, thereception path may be further connected to the amplitude limiter 10415.The amplitude limiter 10415 mainly functions as to limit an amplitude ofan inputted signal, and output a signal with a fixed amplitude. In thisregard, when an uplink signal having a large signal intensity (e.g., 20dBm) and a downlink signal having a small signal intensity (e.g., −70dBm) enter the amplitude limiter 10415 of the reception pathsimultaneously, the uplink signal may be limited to the fixed amplitude,so as to reduce the interference caused by the uplink signal on thedownlink signal. In addition, because the amplitude of the uplink signalentering the reception channel is reduced, relatively small non-lineardistortion may be generated by a back-end circuit due to saturation, soit is also able to ensure the self-interference elimination performanceof the back-end circuit.

For example, suppose that output power of the amplitude limiter 10415 isdesigned as −10 dBm and an uplink signal of 26 dBm enters the receptionpath through the antenna pin 10413, an uplink interference signal of −10dBm may be outputted after the uplink signal is processed by theamplitude limiter 10415, equivalent to the addition of theself-interference suppression of 36 dB.

Finally, it should be appreciated that, depending on the requirement ofa specific link index, a position of the transceiver filter 1042 and aposition of the co-frequency isolator 1041 may be exchanged. Forexample, when the filter is located on the left, an out-of-band spurioussignal generated by a previous-stage circuit may be suppressed at first,so as to ensure the performance of the co-frequency isolator 1041. Whenthe out-of-band spurious signal generated by the previous-stage circuitis relatively low, the co-frequency isolator 1041 may be located beforethe filter.

In a word, according to the co-time co-frequency full duplexing system100 in the embodiments of the present invention, it is able to implementthe transmission in a co-time co-frequency full duplexing manner merelythrough one antenna, one antenna switch 1043 and one transceiver filter1042, thereby to reduce the link complexity as well as the cost. Inaddition, under the effect of the amplitude limiter 10415 in theco-frequency isolator 1041, it is able to acquire a better co-frequencyself-interference suppression index, thereby to improve aself-interference elimination level of the system.

In another aspect, the present invention further provides in someembodiments a mobile terminal including the above-mentioned co-timeco-frequency full duplexing system 100.

According to the mobile terminal in the embodiments of the presentinvention, the co-time co-frequency full duplexing system 100 maytransmit the uplink signal and receive the downlink signal through onesignal transceiver circuit 104, and isolate the uplink signal from thedownlink signal so as to achieve the self-interference suppression. As aresult, it is able to reduce the link complexity for the co-timeco-frequency full duplexing system 100, thereby to reduce the cost.

The present invention further provides in some embodiments a mobileterminal 400. The mobile terminal 400 may be a mobile phone, aflat-panel computer, a Personal Digital Assistant (PDA) or avehicle-mounted computer.

As shown in FIG. 4, the mobile terminal 400 may include a RadioFrequency (RF) circuit 401, a memory 402, an input unit 403, a displayunit 404, a processor 406, an audio circuit 407, a Wireless Fidelity(WiFi) module 408 and a power source 409.

The input unit 403 is used for receiving digital or characterinformation inputted by a user, and generating a signal input related touser settings and function control of the mobile terminal 400. To bespecific, in the embodiment of the present invention, the input unit 403may include a touch panel 4031. The touch panel 4031, also called astouch screen, is used for collecting a touch operation made by the useron or in proximity to the touch panel (e.g., an operation made by theuser through any appropriate object or attachment (e.g., finger orstylus) on or in the proximity to the touch panel 4031), and driving acorresponding connection device in accordance with a predeterminedprogram. Optionally, the touch panel 4031 may include a touch detectionunit and a touch controller. The touch detection device is used fordetecting a touch position of the user, and a signal generated due tothe touch operation, and transmitting the signal to the touchcontroller. The touch controller is used for receiving touch informationfrom the touch detection device, converting it into coordinates of atouch point, transmit the coordinates to the processor 406, andreceiving and executing a command from the processor 406. In addition,the touch panel 4031 may be of a resistive type, a capacitive type, aninfrared type or a surface acoustic wave (SAW) type. Apart from thetouch panel 4031, the input unit 403 may further include another inputdevice 4032 which may include, but not limited to, one or more of aphysical keyboard, a functional button (e.g., a volume control button oran on/off button), a trackball, a mouse, and a joystick.

The display unit 404 is used for displaying information inputted by theuser or information to be presented to the user, and various menuinterfaces for the mobile terminal 400, and it may include a displaypanel 4041. In a possible embodiment of the present invention, thedisplay panel 4041 may be a Liquid Crystal Display (LCD) panel or anOrganic Light-Emitting Diode (OLED) panel.

It should be appreciated that, the touch panel 4031 may cover thedisplay panel 4041, so as to form a touch display panel. When the touchoperation made on or in proximity to the touch display panel has beendetected, the touch information may be transmitted to the processor 406so as to determine a type of a touch event. Then, the processor 406 mayprovide corresponding visual output on the touch display screen inaccordance with the type of the touch event.

The touch display panel may include an application interface displayregion and a commonly-used controls display region. An arrangement modeof the two display regions will not be particularly defined herein,e.g., one of the two display regions may be arranged above or under theother, or arranged to the left or the right of the other, so as todistinguish the two display regions from each other. The applicationinterface display region may be adopted to display interfaces forapplications, and each interface may include an icon for at least oneapplication and/or an interface element such as Widget desktop control.The application interface display region may also be a blank interfacewhere no content is contained. The commonly-used controls display regionmay be adopted to display controls which are used frequently, e.g.,setting button, interface number, scroll bar, or such application iconsas telephone book icon.

The processor 406 may be a control center of the mobile terminal 400,and connected to each member of the entire mobile phone via variousinterfaces and lines. The processor 406 is used for running or executingsoftware programs and/or modules stored in a first memory 4021, andcalling data stored in a second memory 4022, so as to achieve variousfunctions of the mobile terminal 400 and process the data, thereby tomonitor the mobile terminal 400 as a whole. In a possible embodiment ofthe present invention, the processor 406 may include one or moreprocessing units.

In the embodiments of the present invention, a software program and/ormodule stored in the first memory 4021 and/or the data stored in thesecond memory 4022 are called.

As shown in FIG. 1, in the embodiments of the present invention, themobile terminal may further include the co-time co-frequency fullduplexing system 100. The co-time co-frequency full duplexing system 100may include the baseband processing circuit 101, the transmittingterminal signal processing circuit 102, the receiving terminal signalprocessing circuit 103 and the signal transceiver circuit 104. The firstend of the baseband processing circuit 101 may be electrically connectedto the first end of the transmitting terminal signal processing circuit102, the second end of the transmitting terminal signal processingcircuit 102 may be electrically connected to the first end of the signaltransceiver circuit 104, the second end of the baseband processingcircuit 101 may be electrically connected to the first end of thereceiving terminal signal processing circuit 103, and the second end ofthe receiving terminal signal processing circuit 103 may be electricallyconnected to the second end of the signal transceiver circuit 104. Thesignal transceiver circuit 104 is used for transmitting an uplink signaland receiving a downlink signal simultaneously, and isolating the uplinksignal from the downlink signal.

Further, as shown in FIG. 1, the third end of the transmitting terminalsignal processing circuit 102 may be electrically connected to the thirdend of the receiving terminal signal processing circuit 103.

The transmitting terminal signal processing circuit 102 is further usedfor, upon the receipt of the uplink signal transmitted from the basebandprocessing circuit 101, extracting a self-interference eliminationreference signal of the uplink signal, and transmitting theself-interference elimination reference signal to the receiving terminalsignal processing circuit 103.

Further, as shown in FIG. 2, the transmitting terminal signal processingcircuit 102 may include a transmitting terminal digital signalprocessing circuit 1021 and a transmitting terminal analog signalprocessing circuit 1022. A first end of the transmitting terminaldigital signal processing circuit 1021 may be electrically connected tothe first end of the baseband processing circuit 101, a second end ofthe transmitting terminal digital signal processing circuit 1021 may beelectrically connected to a first end of the transmitting terminalanalog signal processing circuit 1022, and a second end of thetransmitting terminal analog signal processing circuit 1022 may beelectrically connected to the first end of the signal transceivercircuit 104.

The transmitting terminal digital signal processing circuit 1021 is usedfor receiving the uplink signal transmitted from the baseband processingcircuit 101, subjecting the received uplink signal to the digitalizationprocess, and transmitting the resultant uplink signal to thetransmitting terminal analog signal processing circuit 1022. Thetransmitting terminal analog signal processing circuit 1022 is used forup-converting and modulating the uplink signal received from thetransmitting terminal digital signal processing circuit 1021, andtransmitting the resultant uplink signal to the signal transceivercircuit 104.

Further, as shown in FIG. 2, the receiving terminal signal processingcircuit 103 may include a receiving terminal digital signal processingcircuit 1031 and a receiving terminal analog signal processing circuit1032. A first end of the receiving terminal digital signal processingcircuit 1031 may be electrically connected to the first end of thebaseband processing circuit 101, a second end of the receiving terminaldigital signal processing circuit 1031 may be electrically connected toa first end of the receiving terminal analog signal processing circuit1032, and a second end of the receiving terminal analog signalprocessing circuit 1032 may be electrically connected to the second endof the signal transceiver circuit 104.

The receiving terminal analog signal processing circuit 1032 is furtherused for receiving the downlink signal transmitted from the signaltransceiver circuit 104, down-converting and demodulating the downlinksignal, and transmitting the resultant downlink signal to the receivingterminal digital signal processing circuit 1031. The receiving terminaldigital signal processing circuit 1031 is used for subjecting thedownlink signal received from the receiving terminal analog signalprocessing circuit 1032 to the digitalization, and transmitting theresultant downlink signal to the baseband processing circuit 101.

Further, as shown in FIG. 2, a third end of the transmitting terminaldigital signal processing circuit 1021 may be electrically connected toa third end of the receiving terminal digital signal processing circuit1031.

The transmitting terminal digital signal processing circuit 1021 isfurther used for, when subjecting the uplink signal to thedigitalization process, extracting a digital self-interferenceelimination reference signal of the uplink signal, and transmitting thedigital self-interference elimination reference signal to the receivingterminal digital signal processing circuit 1031.

Further, as shown in FIG. 2, a third end of the transmitting terminalanalog signal processing circuit 1022 may be electrically connected to athird end of the receiving terminal analog signal processing circuit1032.

The transmitting terminal analog signal processing circuit 1022 isfurther used for, when up-converting and modulating the uplink signal,extracting an analog self-interference elimination reference signal ofthe uplink signal, and transmitting the analog self-interferenceelimination reference signal to the receiving terminal analog signalprocessing circuit 1032.

Further, as shown in FIG. 2, the signal transceiver circuit 104 mayinclude a co-frequency isolator 1041, a transceiver filter 1042, anantenna switch 1043 and a transceiver antenna 1044. A first end of theco-frequency isolator 1041 may be electrically connected to the secondend of the transmitting terminal analog signal processing circuit 1022,a second end of the co-frequency isolator 1041 may be electricallyconnected to the second end of the receiving terminal digital signalprocessing circuit 1031, a third end of the co-frequency isolator 1041may be electrically connected to the first end of the transceiver filter1042, a second end of the transceiver filter 1042 may be electricallyconnected to the first end of the antenna switch 1043, and a second endof the antenna switch 1043 may be electrically connected to thetransceiver antenna 1044.

Upon the co-frequency isolator 1041 receives the uplink signaltransmitted from the transmitting terminal analog signal processingcircuit 1022, the co-frequency isolator 1041 is used for transmittingthe uplink signal to the transceiver filter 1042. The transceiver filter1042 is further used for filtering the uplink signal transmitted fromthe co-frequency isolator 1041. The antenna switch 1043 is used fortransmitting the uplink signal filtered by the transceiver filter 1042to the transceiver antenna 1044. The transceiver antenna 1044 is usedfor transmitting the uplink signal transmitted from the antenna switch1043.

Upon the transceiver antenna 1044 receives the downlink signal, thetransceiver antenna 1044 is used for transmitting the received downlinksignal to the antenna switch 1043. The antenna switch 1043 is furtherused for transmitting the downlink signal transmitted from thetransceiver antenna 1044 to the transceiver filter 1042. The transceiverfilter 1042 is further used for filtering the downlink signaltransmitted from the antenna switch 1043, and transmitting the filtereddownlink signal to the co-frequency isolator 1041. The co-frequency 1041is further used for isolating the transmission and reception of theuplink signal from the transmission and reception of the downlinksignal.

Further, as shown in FIG. 3, the co-frequency isolator 1041 may includea transmission pin 10411, a reception pin 10412, an antenna pin 10413and a load-grounded pin 10414.

The transmission pin 10411 may be electrically connected to the secondend of the transmitting terminal analog signal processing circuit 1022,and the transmission pin 10411 may be connected to the antenna pin 10413to form a transmission path for the uplink signal. The reception pin10412 may be electrically connected to the second end of the receivingterminal analog signal processing circuit 1032, and the reception pin10412 may be connected to the antenna pin 10413 to form a reception pathfor the downlink signal. The antenna pin 10413 may be electricallyconnected to the transceiver filter 1042.

Further, the load-grounded pin 10414 may be connected to a housing ofthe co-frequency isolator 1041, or electrically connected to a groundend in an internal circuit of the co-frequency isolator 1041.

Further, as shown in FIG. 3, the reception path may be further connectedto an amplitude limiter 10415.

Further, the transmission path may be formed by a transmission line.

Further, a line spatial distance between the transmission pin 10411 andthe reception pin 10412 and a line spatial distance between thetransmission path and the reception path may each be greater than orequal to three times of a line width.

In a word, according to the embodiments of the present invention, themobile terminal 400 may transmit the uplink signal and receive thedownlink signal through one signal transceiver circuit 104, and isolatethe uplink signal from the downlink signal so as to achieve theself-interference suppression. As a result, it is able to reduce thelink complexity, thereby to reduce the cost.

The above embodiments have been described in a progressive manner, andthe same or similar contents in the embodiments will not be repeated,i.e., each embodiment merely focuses on the difference from the others.

Although the preferred embodiments of the present invention have beendescribed above, a person skilled in the art may make modifications andalterations to these embodiments in accordance with the basic concept ofthe present invention. So, the attached claims are intended to includethe preferred embodiments and all of the modifications and alterationsthat fall within the scope of the embodiments of the present invention.

In addition, it should be further appreciated that, such words as“first” and “second” are merely used to separate one entity or operationfrom another entity or operation, but are not necessarily used torepresent or imply any relation or order between the entities oroperations. In addition, such terms as “include” or “including” or anyother variations involved in the present invention intend to providenon-exclusive coverage, so that a procedure, method, article or terminaldevice including a series of elements may also include other elementsnot listed herein, or may include any inherent elements of theprocedure, method, article or device. If without any furtherlimitations, for an element defined by such sentence as “including one .. . ”, it is not excluded that the procedure, method, article or deviceincluding the element may also include another identical element.

The above embodiments are preferred embodiments of the presentinvention. It should be appreciated that, a person skilled in the artmay make further modifications and improvements without departing fromthe principle of the present invention, and these modifications andimprovements shall also fall within the scope of the present invention.

What is claimed is:
 1. A co-time co-frequency full duplexing system,comprising a baseband processing circuit, a transmitting terminal signalprocessing circuit, a receiving terminal signal transmission circuit anda signal transceiver circuit, wherein a first end of the basebandprocessing circuit is electrically connected to a first end of thetransmitting terminal signal processing circuit, a second end of thetransmitting terminal signal processing circuit is electricallyconnected to a first end of the signal transceiver circuit; a second endof the baseband processing circuit is electrically connected to a firstend of the receiving terminal signal processing circuit, and a secondend of the receiving terminal signal processing circuit is electricallyconnected to a second end of the signal transceiver circuit, wherein thesignal transceiver circuit is used for transmitting an uplink signal andreceiving a downlink signal simultaneously, and isolating the uplinksignal from the downlink signal; wherein the transmitting terminalsignal processing circuit comprises a transmitting terminal digitalsignal processing circuit and a transmitting terminal analog signalprocessing circuit, wherein a first end of the transmitting terminaldigital signal processing circuit is electrically connected to the firstend of the baseband processing circuit, a second end of the transmittingterminal digital signal processing circuit is electrically connected toa first end of the transmitting terminal analog signal processingcircuit, and a second end of the transmitting terminal analog signalprocessing circuit is electrically connected to the first end of thesignal transceiver circuit; the transmitting terminal digital signalprocessing circuit is used for receiving the uplink signal transmittedfrom the baseband processing circuit, subjecting the received uplinksignal to a digitalization process, and transmitting the digitalizeduplink signal to the transmitting terminal analog signal processingcircuit; the transmitting terminal analog signal processing circuit isused for up-converting and modulating the uplink signal received fromthe transmitting terminal digital signal processing circuit, andtransmitting the up-converted and modulated uplink signal to the signaltransceiver circuit, wherein the receiving terminal signal processingcircuit comprises a receiving terminal digital signal processing circuitand a receiving terminal analog signal processing circuit, wherein afirst end of the receiving terminal digital signal processing circuit iselectrically connected to the first end of the baseband processingcircuit, a second end of the receiving terminal digital signalprocessing circuit is electrically connected to a first end of thereceiving terminal analog signal processing circuit, and a second end ofthe receiving terminal analog signal processing circuit is electricallyconnected to the second end of the signal transceiver circuit; thereceiving terminal analog signal processing circuit is used forreceiving the downlink signal transmitted from the signal transceivercircuit, down-converting and demodulating the downlink signal, andtransmitting the down-converted and demodulated downlink signal to thereceiving terminal digital signal processing circuit; the receivingterminal digital signal processing circuit is used for subjecting thedownlink signal received from the receiving terminal analog signalprocessing circuit to the digitalization process, and transmitting thedigitalized downlink signal to the baseband processing circuit, whereinthe signal transceiver circuit comprises a co-frequency isolator, atransceiver filter, an antenna switch and a transceiver antenna, whereina first end of the co-frequency isolator is electrically connected tothe second end of the transmitting terminal analog signal processingcircuit, a second end of the co-frequency isolator is electricallyconnected to the second end of the receiving terminal analog signalprocessing circuit, a third end of the co-frequency isolator iselectrically connected to a first end of the transceiver filter, asecond end of the transceiver filter is electrically connected to afirst end of the antenna switch, and a second end of the antenna switchis electrically connected to the transceiver antenna; wherein theco-frequency isolator is used for, when the co-frequency isolatorreceives the uplink signal transmitted from the transmitting terminalanalog signal processing circuit, transmitting the uplink signal to thetransceiver filter, the transceiver filter is used for filtering theuplink signal transmitted from the co-frequency isolator, the antennaswitch is used for transmitting the uplink signal filtered by thetransceiver filter to the transceiver antenna, and the transceiverantenna is used for transmitting the uplink signal transmitted from theantenna switch; the transceiver antenna is further used for, when thetransceiver antenna receives the downlink signal, transmitting thereceived downlink signal to the antenna switch, the antenna switch isfurther used for transmitting the downlink signal transmitted from thetransceiver antenna to the transceiver filter, the transceiver filter isfurther used for filtering the downlink signal transmitted from theantenna switch and transmitting the filtered downlink signal to theco-frequency isolator, and the co-frequency isolator is further used forisolating the transmission and reception of the uplink signal from thetransmission and reception of the downlink signal, wherein theco-frequency isolator comprises a transmission pin, a reception pin, anantenna pin and a load-grounded pin, wherein the transmission pin iselectrically connected to the second end of the transmitting terminalanalog signal processing circuit, and the transmission pin is connectedto the antenna pin to form a transmission path for the uplink signal;and the reception pin is electrically connected to the second end of thereceiving terminal analog signal processing circuit, the reception pinis connected to the antenna pin to form a reception path for thedownlink signal and the antenna pin is electrically connected to thetransceiver filter, wherein a line spatial distance between thetransmission pin and the reception pin and a line spatial distancebetween the transmission path and the reception path are each greaterthan or equal to three times of a line width.
 2. The co-timeco-frequency full duplexing system according to claim 1, wherein a thirdend of the transmitting terminal digital signal processing circuit iselectrically connected to a third end of the receiving terminal digitalsignal processing circuit; the transmitting terminal digital signalprocessing circuit is further used for, when subjecting the uplinksignal to the digitalization process, extracting a digitalself-interference elimination reference signal of the uplink signal, andtransmitting the digital self-interference elimination reference signalto the receiving terminal digital signal processing circuit.
 3. Theco-time co-frequency full duplexing system according to claim 1, whereina third end of the transmitting terminal analog signal processingcircuit is electrically connected to a third end of the receivingterminal analog signal processing circuit; the transmitting terminalanalog signal processing circuit is further used for, when up-convertingand modulating the uplink signal, extracting an analog self-interferenceelimination reference signal of the uplink signal, and transmitting theanalog self-interference elimination reference signal to the receivingterminal analog signal processing circuit.
 4. The co-time co-frequencyfull duplexing system according to claim 1, wherein the load-groundedpin is connected to a housing of the co-frequency isolator, orelectrically connected to a ground end in an internal circuit of theco-frequency isolator.
 5. The co-time co-frequency full duplexing systemaccording to claim 1, wherein the reception path is connected with anamplitude limiter.
 6. The co-time co-frequency full duplexing systemaccording to claim 1, wherein the transmission path is formed by atransmission line.
 7. A mobile terminal, comprising the co-timeco-frequency full duplexing system according to claim
 1. 8. The mobileterminal according to claim 7, wherein a third end of the transmittingterminal digital signal processing circuit is electrically connected toa third end of the receiving terminal digital signal processing circuit;the transmitting terminal digital signal processing circuit is furtherused for, when subjecting the uplink signal to the digitalizationprocess, extracting a digital self-interference elimination referencesignal of the uplink signal, and transmitting the digitalself-interference elimination reference signal to the receiving terminaldigital signal processing circuit.
 9. The mobile terminal according toclaim 7, wherein a third end of the transmitting terminal analog signalprocessing circuit is electrically connected to a third end of thereceiving terminal analog signal processing circuit; the transmittingterminal analog signal processing circuit is further used for, whenup-converting and modulating the uplink signal, extracting an analogself-interference elimination reference signal of the uplink signal, andtransmitting the analog self-interference elimination reference signalto the receiving terminal analog signal processing circuit.
 10. Themobile terminal according to claim 7, wherein a third end of thetransmitting terminal signal processing circuit is electricallyconnected to a third end of the receiving terminal signal processingcircuit, wherein the transmitting terminal signal processing circuit isused for, upon receipt of the uplink signal transmitted from thebaseband processing circuit, extracting a self-interference eliminationreference signal of the uplink signal, and transmitting theself-interference elimination reference signal to the receiving terminalsignal processing circuit.
 11. The mobile terminal according to claim 7,wherein the load-grounded pin is connected to a housing of theco-frequency isolator, or electrically connected to a ground end in aninternal circuit of the co-frequency isolator.
 12. The mobile terminalaccording to claim 7, wherein the reception path is connected with anamplitude limiter.
 13. The mobile terminal according to claim 7, whereinthe transmission path is formed by a transmission line.
 14. The co-timeco-frequency full duplexing system according to claim 1, wherein a thirdend of the transmitting terminal signal processing circuit iselectrically connected to a third end of the receiving terminal signalprocessing circuit, wherein the transmitting terminal signal processingcircuit is used for, upon receipt of the uplink signal transmitted fromthe baseband processing circuit, extracting a self-interferenceelimination reference signal of the uplink signal, and transmitting theself-interference elimination reference signal to the receiving terminalsignal processing circuit.